Added multiline comments

.gitignore

@@ -3,3 +3,4 @@ out/
 *.zip
 prg/**/*.ast
 prg/**/*.out
+prg/**/*.pins25

grammar.txt

@@ -39,9 +39,8 @@ restcmp -> EQU addexpr
 		 | .
 
 addexpr -> multexpr restadd .
-restadd -> ADD addexpr
+restadd -> ADD multexpr restadd
-		 | SUB addexpr
+		 | SUB multexpr restadd | .
-		 | .
 
 multexpr -> prefixexpr restmult .
 restmult -> MUL prefixexpr restmult

prg/test.pins25

@@ -1,3 +0,0 @@
-
-fun main() =
-	3 - 2 - 1

src/pins25/phase/LexAn.java

@@ -247,8 +247,37 @@ public class LexAn implements AutoCloseable {
                     return;
                 }
 
-                while (buffChar != '\n' && buffChar != -1) {
+                nextChar();
+                if (buffChar == '{') {
+                    int depth = 1;
+
                     nextChar();
+                    while (depth > 0) {
+                        switch (buffChar) {
+                            case '}':
+                                nextChar();
+                                if (buffChar != '/') continue;
+                                nextChar();
+                                if (buffChar != '/') continue;
+                                depth--;
+                                break;
+                            case '/':
+                                nextChar();
+                                if (buffChar != '/') continue;
+                                nextChar();
+                                if (buffChar != '{') continue;
+                                depth++;
+                                break;
+                            case -1:
+                                throw new Report.Error(currentLocation(), "Unterminated multiline comment");
+                            default:
+                                nextChar();
+                        }
+                    }
+                } else {
+                    while (buffChar != '\n' && buffChar != -1) {
+                        nextChar();
+                    }
                 }
 
                 nextToken();

src/pins25/phase/SynAn.java

@@ -540,20 +540,20 @@ public class SynAn implements AutoCloseable {
         Token token = lexAn.peekToken();
         switch (token.symbol()) {
             case ADD: {
-                // restadd -> ADD addexpr
+                // restadd -> ADD multexpr restadd
                 check(Token.Symbol.ADD);
-                AST.Expr right = parseAdditionExpression();
+                AST.Expr right = parseMultiplicationExpression();
                 AST.Expr binExpr = new AST.BinExpr(AST.BinExpr.Oper.ADD, left, right);
                 attrLoc.put(binExpr, new Report.Location(attrLoc.get(left), attrLoc.get(right)));
-                return binExpr;
+                return parseRestAdditionExpressions(binExpr);
             }
             case SUB: {
-                // restadd -> ADD addexpr
+                // restadd -> SUB multexpr restadd
                 check(Token.Symbol.SUB);
-                AST.Expr right = parseAdditionExpression();
+                AST.Expr right = parseMultiplicationExpression();
                 AST.Expr binExpr = new AST.BinExpr(AST.BinExpr.Oper.SUB, left, right);
                 attrLoc.put(binExpr, new Report.Location(attrLoc.get(left), attrLoc.get(right)));
-                return binExpr;
+                return parseRestAdditionExpressions(binExpr);
             }
 
             default: